this is my marble gun it use a sprinkler valve the piping for the chamber is 28mm the barrel is 16mm (marble)I haven't shoot with it but I did some tests and the pilot valve starts leaking at 6 bar I need to get a better one I hope my chamber is big enough to do 2 shots if I put 14 bar on it more specs are soon to come

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I will buy an elbow to place the vave like this

Last edited by sniper hero on Sun May 18, 2008 10:58 am, edited 1 time in total.

Nice gun mate. The problem is the blowgun you're using. They aren't meant to be used flipped around in that fashion. The Poppet valve in the blowgun when it's hooked up properly, uses the pressure behind it to push and make a seal firm against the blowgun lip. If the blowgun is flipped around, the poppet valve is only as strong as the spring behind it so it will leak at a cirtain point. The pressure will be too much for the poppet valve spring so just like a pop off pressure release valve, it'll give way eventually. At 30psi for example.

The solution is very simple. You need the inline style of blowgun that can be bought for a few bucks. I hope this helps mate